Rock Identifier

Category

Igneous Or Sedimentary (Water Worn)

Browse igneous or sedimentary (water worn) specimens identified by the Rock Identifier community.

Learn about Igneous Or Sedimentary (Water Worn) in the encyclopedia

Water Opal

Enhydro Quartz

Carbonatite

Clear Beryl

Ice Opal

Hyalite Opal

Iolite

Conglomerate

Jelly Opal

Clear Obsidian

Coldwater Agate

Clear Tourmaline

Clear Tourmaline

Jasper (Silicon dioxide (SiO2)) — sedimentary

Jasper

Silicon dioxide (SiO2)

Tumbled magnetite (likely) (Magnetite, Fe₃O₄; possibly magnetite-rich ironstone) — mineral

Tumbled magnetite (likely)

Magnetite, Fe₃O₄; possibly magnetite-rich ironstone

Worn River Pebble with Fossil Indentation (Sedimentary Rock with Fossil Infill) — sedimentary

Worn River Pebble with Fossil Indentation

Sedimentary Rock with Fossil Infill

Turtle Stone / Septarian Nodule (Water-worn) (Septarian Concretion) — sedimentary

Turtle Stone / Septarian Nodule (Water-worn)

Septarian Concretion

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Porphyritic) (Porphyritic Basalt) — igneous

Basalt (Porphyritic)

Porphyritic Basalt

Basalt (Beach Pebble) (Basalt) — igneous

Basalt (Beach Pebble)

Basalt

Jasper / Chert / Quartzite (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper / Chert / Quartzite

Microcrystalline Quartz (SiO2)

Basalt (Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)) — igneous

Basalt

Mafic Igneous Rock (composed primarily of plagioclase, pyroxene, and olivine)

Basalt Puddle Stone (Basalt (Mafic volcanic rock)) — igneous

Basalt Puddle Stone

Basalt (Mafic volcanic rock)

Quartz Pebble (Iron-Stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble (Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Yellow Jasper (Silicon Dioxide (SiO2) with iron hydroxides) — sedimentary

Yellow Jasper

Silicon Dioxide (SiO2) with iron hydroxides

Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Jasper

Microcrystalline Quartz (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Rounded weathered stone, likely quartz-rich sandstone or fine-grained volcanic rock (Indeterminate hand specimen; probable quartz–feldspar sandstone (SiO₂-rich)) — sedimentary

Rounded weathered stone, likely quartz-rich sandstone or fine-grained volcanic rock

Indeterminate hand specimen; probable quartz–feldspar sandstone (SiO₂-rich)

Magnetite / Iron-Rich Concretion (Magnetite (Fe3O4) or Bog Iron Limonite) — mineral

Magnetite / Iron-Rich Concretion

Magnetite (Fe3O4) or Bog Iron Limonite

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Milky Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Banded Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Metamorphic Rock)

Beach Pebble (Chert / Greywacke) (Silicon Dioxide (SiO2) / Quartz-rich Sandstone) — sedimentary

Beach Pebble (Chert / Greywacke)

Silicon Dioxide (SiO2) / Quartz-rich Sandstone

Beach Agate / Jasper Pebble (Cryptocrystalline Quartz (SiO2)) — sedimentary

Beach Agate / Jasper Pebble

Cryptocrystalline Quartz (SiO2)

Agate Pebble (Silicon dioxide (SiO2) - Chalcedony variety) — sedimentary

Agate Pebble

Silicon dioxide (SiO2) - Chalcedony variety

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz (Milky or Smoky Quartz variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Smoky Quartz variety)

Silicon Dioxide (SiO2)

Chalcedony (Agate/Jasper mix) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chalcedony (Agate/Jasper mix)

Cryptocrystalline Quartz (SiO2)

Carnelian Agate (Silicon Dioxide (SiO2) - variety of Chalcedony) — sedimentary

Carnelian Agate

Silicon Dioxide (SiO2) - variety of Chalcedony

Carnelian (Red Agate) (Chalcedony (SiO2 with Iron Oxide impurities)) — mineral

Carnelian (Red Agate)

Chalcedony (SiO2 with Iron Oxide impurities)

Sandstone (with Iron Staining) (Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)) — sedimentary

Sandstone (with Iron Staining)

Clastic Sedimentary Rock (SiO2 with Fe2O3/FeO oxides)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (Clastic Sedimentary Rock)) — sedimentary

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Chert Pebble (with Quartz Vein) (Silicon Dioxide (SiO2)) — sedimentary

Chert Pebble (with Quartz Vein)

Silicon Dioxide (SiO2)

Riverstone Jasper (Silicon Dioxide (SiO2) with impurities) — sedimentary

Riverstone Jasper

Silicon Dioxide (SiO2) with impurities

Banded Gneiss River Pebble (Gneiss) — metamorphic

Banded Gneiss River Pebble

Gneiss

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Chert (with Quartz Vein) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Quartz Vein)

Microcrystalline Quartz (SiO2)

Jasper / Quartzite pebble (Silicon dioxide (SiO2) with iron impurities) — sedimentary/metamorphic

Jasper / Quartzite pebble

Silicon dioxide (SiO2) with iron impurities

sedimentary/metamorphic